NASA leaders said the shakeup is meant to address a larger underlying problem: the U.S. agency is flying its most powerful rocket too infrequently and repeating some of the same technical issues from one mission to the next.
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，更多细节参见WPS下载最新地址
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白宮尚未直接就退款的可能性發表評論，而多格特表示，這並不是一個簡單的問題。